Compound wooden plate.



H. H. BASSE.

COMPOUND WOODEN PLATE. APPLICATION FILED 4116.10, 1911.

1,015,775. I Patented Jan; 30, 1912.

and Improved Compound Wooden Plate,

UNITED STATES HEINRICH HEBMANN IBASSE, OF HOLTENSEN, GERMANY.

COMPOUND WOODEN PLATE.

Specification of Letters Patent.

Patented Jan. 30', 1912.

I Application filed August 10, 1911. Serial No. 648,327.

To all whom it may concern:

Be it known that I, HEINRICH HERMANN BASSE, a citizen of Germany,residing at Holtensen, Germany, have invented a nev;

which the following is a specification.

This invention relates to an im roved compound wooden plate or tablet 0novel construction bled and possesses superior strength and bindingqualities. 1

In the drawing: Figure 1 is an end view of a wooden plate embodying myinvention, with parts of the upper and lower layers removed; Fig. 2 aplan thereof, and Fig. 3 a diagram showing the device for pressing theplates.

The core of the plate is composed of a plurality of wooden strips (1which are spaced from each other as at b. Each strip a is provided onone side with a number of obliueqly extending grooves 13 and on theother side with similar grooves c arran ed crosswise to grooves 0. Eachstrip is urther provided with a longitudinal grooved extending in thedirection of the grain o the wood. To the upper and lower sides ofstrips a are lued wooden covering plates 9, the grain 0 which extends atright angles to that of strips 0. To plates 9 are glued the hard woodsurface veneers f. l

The elements being assembled as described are subjected to pressure bythe device illustrated in Fig. 3. This device consists of a level cementfloor 1-, and an overhead rail 2 upon which travels a crane 3 from whicha massivescastmetal plate 4 weighing about which may be readily assemtwotons is adapted tobe lowered. The

glued plates -5 are placed upon floor 1 and one or more of the weights 4are by the crane lowered upon the wooden plates. The weights are allowedto remain in position for a length of time sufiicient for permitting theglue to bind, when the" operation is completed. t

By the use of the weights 4 in lieu of the hydraulic presses heretoforegenerally employed, several advantages are obtained.

The excessive available pressure of the hydraulic press would cause theglue to spread unevenly owing to the harder or softer, closer or w'der,of the wood fibers, so that small bubbles were apt to form during) thepressing operation. Furthermore y the hydraulic press an uneven heatingand alsoan excessive heating was wasapt to destroy the the lue. So alsothe alternate heating chilllng of the press was apt to injurlouslyaffect the wood, especially as running expenses made it practicaeratlons.

I claim:

A compound wooden plate comprising a plurality of spaced cross stripshaving upper and lower intersecting oblique grooves and,

Ross J. Tnomrson.

drier or moister condition liableto take place which binding qualityofand impossible for f the press to stand idle during successive op-

